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quant-ph2026
Security of passive entanglement-based key distribution protocols
Shun Kawakami, Koichi Takasugi, Koji Azuma
Entanglement-based key distribution protocols, such as the Bennett-Brassard-Mermin 1992 (BBM92) protocol and quantum conference key agreement (QCKA), are promising applications of…
quant-ph2025
Security of the BB84 protocol with passive biased basis choice by the receiver
Shun Kawakami, Atsushi Taniguchi, Yoshihide Tonomura +2
The Bennett-Brassard 1984 protocol (BB84 protocol) is one of the simplest protocols for implementing quantum key distribution (QKD). In the protocol, the sender and the receiver it…
quant-ph2024
Linear-optical fusion boosted by high-dimensional entanglement
Tomohiro Yamazaki, Koji Azuma
We propose a quantum measurement that probabilistically projects a pair of qudits of dimension onto a Bell state in a two-qubit subspace. It can be performed using linear-optic…